Roller-bearing.



' 0. S. PULLIAM 6L1. ALLISON.

ROLLER BEARING.

APPLICATION FILED JULY 2, I910.

1 ,147,433, v Patented Jul 20, 1915.

k I Mk I OSWALD S. PULLIAM, OF PITTSBURGH, AND JOHN ALLISON,-

PENNSYLVANIA.

or DRAVOSBUR'G,"

ROLLER-BEARING.

Specification of Letters Patent.

' Patented July 20, 1915.

Application filed July 2, 1910. Serial No. 570,186.

To all whom it may concern Be it known that we, ()sWALD S. PULLIAM and JOHN ALLISON, residents of Pittsburgh and Dravosburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Roller-Bearings, of which the following is a specification.

The prime object of our invention is to provide a new and improved roller bearing designed for use in railway car construction, as. for example, car center and side bearings, although our invention may be employed for other purposes, for example, for a shaft or journal hearing.

A further object of our invention is to provide new and improved means for separating the burden carrying rollers; and a still further object is to provide means for taking care of the side or end thrusts to which bearings of this class are, subjected.

In the accompanying drawings, which illustrate applications of our invention Figure1,is a part elevational and a part vertical sectional view of a center bearing construction for'cars embodying our invention; and Fig. 2, a similar view of a side bearing for cars embodying our invention.

Referring to the drawing and first to the form of Fig. 1, 2 designates a portion of a body-bolster center-bearing provided with a central aperture 3, adapted to receive a kingbolt, not shown, and 4a casing adapted to be secured to the car body-bolster. As will be seen, the casing 4 is provided with a straight vertical wall which, as presently refer-red to, forms a bearing face.

5 represents a portion of a truck-bolster of a car having a center-bearing member 6 formed integral therewith. The truck-bolster is provided with an opening 7 corre sponding with the opening 3 for the purpose of receiving the king-bolt when the body and truck-bolsters are assembled. The

bearing face of the truck center-bearing projects upwardly below the lower end of the casing 4 and is preferably inclined as shown.

Interposed between the respective inclined-bearing faces of the center-bearing members of the truck and body-bolsters we provide a series of freely rotatable burden carrying rollers 8. As shown, rollers 8 are of conical form and each is provided at its ends with spacing members in the form of caps 9 and 9 mounted on the respective ends of the rollers 8. The caps 9 are crowned to provide a curved or rounded thrust bearing face adapted to make contact with the bearing face wall of the casing 4. Caps 9 perform the double function of spacing or maintaining the large ends of apart as well as for said rollers.

In the side roller-bearing constructions shown by Fig. 2, 10 designates a casing or casting adapted to be secured to a bodybolster, notv shown, and, 11 a side bearing member formed integral with a truck-bolster 12. As illustrated, casing 10 is formed with ledges or shoulders 13 and with inwardly projecting flanges 14.. Located withacting as thrust bearings the rollers in the casing 10 and supported on the shoulders 13 thereof we provide a plate or member 15 having reduced side portions 16.

Adapted to travel on and around member 15 is a series of cylindrical burden carrying rollers 17 with each roller provided at its ends with a cap 18 having a crowned thrust bearing face 19, the latter being projected beyond the ends of the respective rollers and adapted to make contact with the blocks 20 carried in the casing 10.

What we claim is 1. In a roller bearing, the combination with an outer casing having a straight vertical wall forming a bearing face, of a plurality of conical burden carrying rollers, of a cap thrust bearing member for each roller telescoped over an end thereof and having a curved. bearing-surface adapted to oppose said straight wall.

2. In a roller bearing, the combination with a casing having a straight vertical wall to form a bearing surface, of a plurality of free conical burden-carrying rollers, of a separable telescopic cap thrust-bearing member mounted on rollers, said cap members e'ach havin a each end of the reipective curved bearing surface projecting beyon an 2 surface of the casburden-carrying rollers, individual spacing members mounted on the ends of each roller, each spacing member being in the form of a cap teleseoped over a roller end and having a curved thrust-bearing surface adapted to make contact with said bearing surface wall of the casing.

In testimony whereof We aflix our signatures in presence of two witnesses.

OSlVALD S. PULLIAM. JOHN ALLISON.

Vitnesses i \V. G. DOOLITTLE,

F. E. GAITHER. 

